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Double-layer and hydration forces measured between silica sheets subjected to various surface treatments

journal contribution
posted on 1993-05-01, 00:00 authored by A Grabbe, Roger Horn
Force measurements between silica surfaces in aqueous solutions of NaCl are reported. Silica is prepared with one of three surface treatments: (i) flaming, (ii) exposure to steam for 150 h, and (iii) brief exposure to ammonia vapor. Analysis of electrical double-layer interactions indicates that the surface density of silanol groups increases with steam treatment, and that exposure to ammonia etches the surface slightly and renders it porous. The force at short range is dominated by a strong repulsion which is attributed to hydration of the surface. The hydration component of the force is not significantly affected by the surface treatments, nor by electrolyte concentration over the range investigated (up to 0.1 M).

History

Journal

Journal of colloid and interface science

Volume

157

Issue

2

Pagination

375 - 383

Publisher

Academic Press

Location

Maryland Heights, Mo.

ISSN

0021-9797

eISSN

1095-7103

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2-s2.0-36448996421

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